Window sash fastener



FIG. 1 is a top plan view of a window sash fastener showing our new design;

FIG. 2 is a top plan view thereof, shown in unfastened position;

FIG. 3 is a vertical sectional view thereof, taken along line 3--3 of FIG. 1;

FIG. 4 is an end elevational view thereof, the opposite end being substantially similar in appearance;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and

FIG. 7 is a top, front perspective view thereof. 

The ornamental design for a window sash fastener, as shown and described. 